Subcellular localization of IgG from the sera of ALS patients in the nervous system

József István Engelhardt, J. Soós, I. Obál, L. Vigh, L. Siklós

Research output: Contribution to journalArticle

31 Citations (Scopus)


Immunoglobulin G (IgG) samples isolated from the sera of amyotrophic lateral sclerosis (ALS) and control patients were injected intraperitoneally into mice. After 24 h the mice were processed for immune electron microscopic immunohistochemistry to localize IgG in their nervous system. The injected ALS IgG was observed in the axon terminals of the lower motor neurons (MNs), localized to the microtubules and enriched in the rough endoplasmic reticulum (RER). In post-mortem spinal cord samples from ALS patients, IgG was similarly detected in the vicinity of the microtubules and in the RER of the MNs. IgG was neither found in the corresponding structures of MNs of mice injected with the control human IgG nor in post-mortem human control spinal cord samples. The data suggest that multiple antibodies directing to different structures of the MNs may play a role in their degeneration in ALS.

Original languageEnglish
Pages (from-to)126-133
Number of pages8
JournalActa Neurologica Scandinavica
Issue number2
Publication statusPublished - Aug 1 2005


  • Amyotrophic lateral sclerosis
  • Immunoglobulin G
  • Localization
  • Motor neuron
  • Passive transfer

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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